pick a number for mean and standard deviation generate 5 random numbers using a normal distribution...
pick a number for mean and standard deviation
generate 5 random numbers using a normal distribution and mean and standard deviation from
(i) using your 5 numbers find the mean and the standard deviation of your data
How far is your sample mean from your true mean?
By 'far' I mean how many sample standard deviations. use the absolute value of distance here
Repeat steps 2-4 1000 times. you should now have 1000 measures how far your sample mean is from the true mean. rank them.
At what value is 95% of your distances below? This should correspond to the 95% number of a 4 degree of freedom t table. Check that it does. What about 90%? Check the correlation of your list of means with your list of standard deviations. It should be close to 0.
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pick a number for mean and standard deviation
generate 5 random numbers using a normal distribution...
The difference between the T distribution and the standard normal (z) distribution decreases as the degrees...
The difference between the T distribution and the standard normal (z) distribution decreases as the degrees of freedom increase. True False When estimating the number of responses to be collected in order to achieve a desired margin of error on a proportion, what value should be used for the population proportion if no estimate is available? Enter your answer as a decimal to 2 decimal places. A population is believed to have a standard deviation of 23.1. An analyst wants...
An unknown distribution has a mean of 80 and a standard deviation of 12. A sample...
An unknown distribution has a mean of 80 and a standard deviation of 12. A sample size of 95 is drawn randomly from the population. Find the sum that is 1.5 standard deviations below the mean of the sums.
A distribution of values is normal with a mean of 100 and a standard deviation of...
A distribution of values is normal with a mean of 100 and a standard deviation of 12. From this distribution, you are drawing samples of size 11. Find the interval containing the middle-most 74% of sample means: Enter your answer using interval notation. In this context, either inclusive or exclusive intervals would be acceptable. Your numbers should be accurate to 1 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.
1. A population of values follows a normal distribution with standard deviation 5 and unknown mean....
1. A population of values follows a normal distribution with standard deviation 5 and unknown mean. A random sample of size 16 has mean 24. a) Write what each number represents. b) Find and interpret the 95% CI for the unknown population mean. c) Is 30 a plausible population mean? Explain.
A distribution of values is normal with a mean of 170 and a standard deviation of...
A distribution of values is normal with a mean of 170 and a standard deviation of 12. From this distribution, you are drawing samples of size 13. 2. From this distribution, you're Find the interval containing the middle-most 48% of sample means: Enter your answer using interval notation. In this context, either inclusive or exclusive intervals would be acceptable. Your numbers should be accurate to 1 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places...
A distribution of values is normal with a mean of 230 and a standard deviation of...
A distribution of values is normal with a mean of 230 and a standard deviation of 14. From this distribution, you are drawing samples of size 14. Find the interval containing the middle-most 36% of sample means: Enter your answer using interval notation. In this context, either inclusive or exclusive intervals would be acceptable. Your numbers should be accurate to 1 decimal places. Answers obtained using exact-scores or z-scores rounded to 3 decimal places are accepted. Points possible: 1 License...
Suppose x has a normal distribution with mean = 18 and standard deviation 0 - 13....
Suppose x has a normal distribution with mean = 18 and standard deviation 0 - 13. Describe the distribution of x values for sample size n = 4. (Round o; to two decimal places.) Describe the distribution of x values for sample size n = 16. (Round o; to two decimal places.) Describe the distribution of x values for sample size n = 100. (Round o; to two decimal places.) How do the x distributions compare for the various samples...
SAT scores have approximately a normal distribution with mean equal to 550 and a standard deviation...
SAT scores have approximately a normal distribution with mean equal to 550 and a standard deviation equal to 90. a) draw a graph of this distribution b) find the median and the mode -I drew the a normal bell graph with the middle number being the mean (550) and then added and subtracted 90 from each number for 3 standard deviations. Would the median and mode just be 550 as well since this a normal distribution?
Jump to level 1 2 The mean voltage and standard deviation of 5 batteries from each...
Jump to level 1 2 The mean voltage and standard deviation of 5 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio 3 А 126 5 B 119 4 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 0 What is the number of degrees of freedom? Ex: 259 Does sufficient evidence exist to support the claim that the voltage...
Question 3 0/1 pt: An unknown distribution has a mean of 80 and a standard deviation...
Question 3 0/1 pt: An unknown distribution has a mean of 80 and a standard deviation of 12. A sample size of 95 is drawn randomly from the population. Find the sum that is two standard deviations above the mean of the sums. 0.5 Question 4 0/1 pts Animknown distribution has alimeanofolandastandard deviation of 12
1. A population of values follows a normal distribution with standard deviation 5 and unknown mean. A random sample of size 16 has mean 24. a) Write what each number represents. b) Find and interpret the 95% CI for the unknown population mean. c) Is 30 a plausible population mean? Explain.
A distribution of values is normal with a mean of 170 and a standard deviation of 12. From this distribution, you are drawing samples of size 13. 2. From this distribution, you're Find the interval containing the middle-most 48% of sample means: Enter your answer using interval notation. In this context, either inclusive or exclusive intervals would be acceptable. Your numbers should be accurate to 1 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places...
A distribution of values is normal with a mean of 230 and a standard deviation of 14. From this distribution, you are drawing samples of size 14. Find the interval containing the middle-most 36% of sample means: Enter your answer using interval notation. In this context, either inclusive or exclusive intervals would be acceptable. Your numbers should be accurate to 1 decimal places. Answers obtained using exact-scores or z-scores rounded to 3 decimal places are accepted. Points possible: 1 License...
Suppose x has a normal distribution with mean = 18 and standard deviation 0 - 13. Describe the distribution of x values for sample size n = 4. (Round o; to two decimal places.) Describe the distribution of x values for sample size n = 16. (Round o; to two decimal places.) Describe the distribution of x values for sample size n = 100. (Round o; to two decimal places.) How do the x distributions compare for the various samples...
Jump to level 1 2 The mean voltage and standard deviation of 5 batteries from each manufacturer were measured. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Sample standard deviatio 3 А 126 5 B 119 4 What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.123 0 What is the number of degrees of freedom? Ex: 259 Does sufficient evidence exist to support the claim that the voltage...
Question 3 0/1 pt: An unknown distribution has a mean of 80 and a standard deviation of 12. A sample size of 95 is drawn randomly from the population. Find the sum that is two standard deviations above the mean of the sums. 0.5 Question 4 0/1 pts Animknown distribution has alimeanofolandastandard deviation of 12
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